Lucys grandmother purchased 100 shares of GE stock priced at $10/share in 1970. Lucy inherited the stock when her grandmother passed away this year. On the date of death, the stock was valued at $70/share. Lucy sold the stock 3 months later for $73/share. If Lucys grandmother had gifted the stock to Lucy the day before she died (the stock price was $70/share), what is the amount of the gain Lucy must report on her income tax return?